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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Kathiresan,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I don't think you can do a parametric run of a water economizer chiller in the way you describe. As I noted in my response to Tom a couple years ago, you'll need to define a *<b>separate</b>* water economizer chiller, condenser loop, and cooling tower *<b>in addition to</b>* the other chiller(s), loop(s), and cooling tower(s). This will probably be more successful if you generate a separate model to compare to your baseline rather than attempt it as a parametric run. Have a look at the equest/DOE new features manual at the section on “water economizer chillers”.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If you continue to run into problems, I recommend posting your .inp and .pd2 files to the equest users list. For any given modeling problem, odds are there's at least one person on the list who's worked out a defensible/sensible method of handling the problem.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Good luck,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Steven<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Kathiresan.Rajagopal@jci.com [mailto:Kathiresan.Rajagopal@jci.com] <b>On Behalf Of </b>cic@jci.com<br><b>Sent:</b> Monday, November 21, 2011 5:10 AM<br><b>To:</b> Steven Savich<br><b>Subject:</b> Re: [Equest-users] eQuest Workaround for Water Economizers<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'><br><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Dear Steve,</span> <br><br><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I am trying to do parametric run for water economizer chiller just by changing water economizer from elect cent chiller. But it seems i am not getting any result. It seems i am missing lot of inputs.</span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Can you please put some important points needs to be taken care when modeling water economizer.?</span> <br><br><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks for your advice</span> <br><br><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>regards</span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Kathiresan</span> <br><br><o:p></o:p></p><table class=MsoNormalTable border=0 cellspacing=3 cellpadding=0 width="100%" style='width:100.0%'><tr><td valign=top style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#5F5F5F'>From:</span> <o:p></o:p></p></td><td valign=top style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>"Steven Savich" <ssavich@systemswestengineers.com></span> <o:p></o:p></p></td></tr><tr><td valign=top style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#5F5F5F'>To:</span> <o:p></o:p></p></td><td valign=top style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'><Tom@NorthernArchitects.com></span> <o:p></o:p></p></td></tr><tr><td valign=top style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#5F5F5F'>Cc:</span> <o:p></o:p></p></td><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>equest-users@lists.onebuilding.org</span> <o:p></o:p></p></td></tr><tr><td valign=top style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#5F5F5F'>Date:</span> <o:p></o:p></p></td><td valign=top style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>09/18/2009 09:44 PM</span> <o:p></o:p></p></td></tr><tr><td valign=top style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#5F5F5F'>Subject:</span> <o:p></o:p></p></td><td valign=top style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>Re: [Equest-users] eQuest Workaround for Water Economizers</span><o:p></o:p></p></td></tr></table><p class=MsoNormal><o:p> </o:p></p><div class=MsoNormal align=center style='text-align:center'><hr size=3 width="100%" noshade style='color:gray' align=center></div><p class=MsoNormal><br><br><br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Tom, </span><br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>In the equest/DOE new features manual, there’s a section on “water economizer chillers”</span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Basically, to run a cooling tower in water economizer mode, you have to define a (virtual) water economizer chiller and attach a cooling tower & condenser water loop to it. You’ll need to set up the water econ chiller, water econ condenser loop, and water econ cooling tower as *<b>completely</b>* separate entities from any other chillers & cooling towers that you run and have them attached to the primary chilled water loop in parallel with the other chillers.</span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>You also may need to use schedules, equipment controls, and load management of the chillers and circulation loops depending on your exact plant configuration.</span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>For the water econ info, look under help/DOE2 help/Volume 6: New Features/Chiller Water Economizer</span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Hope this helps,</span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Steven</span> <br><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span> <br><span style='font-family:"Bookman Old Style","serif";color:navy'>Steven Savich, LEED AP</span> <br><span style='font-size:10.0pt;font-family:"Bookman Old Style","serif";color:navy'>Systems West Engineers</span> <br><span style='font-size:10.0pt;font-family:"Bookman Old Style","serif";color:navy'>411 High Street</span> <br><span style='font-size:10.0pt;font-family:"Bookman Old Style","serif";color:navy'>Eugene, OR 97401-2427</span> <br><span style='font-size:10.0pt;font-family:"Bookman Old Style","serif";color:navy'>(541) 342-7210</span> <br><span style='font-size:10.0pt;font-family:"Bookman Old Style","serif";color:navy'>(541) 342-7220 (fax)</span> <o:p></o:p></p><p class=MsoNormal align=center style='text-align:center'><o:p> </o:p></p><div class=MsoNormal align=center style='text-align:center'><hr size=3 width="100%" align=center></div><p class=MsoNormal style='margin-bottom:12.0pt'><br><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Tom O'Brien [</span><a href="mailto:Tom@NorthernArchitects.com"><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>mailto:Tom@NorthernArchitects.com</span></a><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>] <b><br>Sent:</b> Friday, September 18, 2009 7:56 AM<b><br>To:</b> ssavich@systemswestengineers.com<b><br>Subject:</b> eQuest Workaround for Water Economizers</span> <br> <br><span style='font-size:10.0pt'>Steve -</span> <br><span style='font-size:10.0pt'> </span> <br><span style='font-size:10.0pt'>I read your eQuest post today today regarding your campus chilled water system / local cooling tower question. I'm afraid I don't have a suggestion as I've not progressed that far with eQuest.</span> <br><span style='font-size:10.0pt'> </span> <br><span style='font-size:10.0pt'>However, you noted that "I’m familiar with the equest workaround for water economizers". We've been stumped by this in trying to set up a cooling tower / chiller combination that lets the cooling tower act as a precooler for the air-cooled chillers and/or as the cooling source when the building needs cooling in the winter months (our winter months are plenty cold enough to handle the relatively low cooling needs we have with a cooling tower without running the chillers). eQuest doesn't seem to have a way to allow us to connect both the chillers and the cooling tower to the chilled water piping. The typical eQuest cooling tower seems to want to connect to the condenser water off the chillers and assumes the chillers are water-cooled.</span> <br><span style='font-size:10.0pt'> </span> <br><span style='font-size:10.0pt'>Can you point me in the right direction to find the find the workaround you mentioned?</span> <br><span style='font-size:10.0pt'> </span> <br><span style='font-size:10.0pt'>Many Thanks.</span> <br><span style='font-size:10.0pt'> </span> <br><span style='font-size:10.0pt'>Tom</span> <br><br><br>Tom O'Brien<br>Northern Architects, Inc.<br>207 King Street Suite 3<br>Burlington, VT 05401<br>T: 802-658-1953<br>F: 802-658-2975<br>E: Tom@NorthernArchitects.com<tt><span style='font-size:10.0pt'>_______________________________________________</span></tt><span style='font-size:10.0pt;font-family:"Courier New"'><br><tt>Equest-users mailing list</tt><br></span><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org"><tt><span style='font-size:10.0pt'>http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</span></tt></a><span style='font-size:10.0pt;font-family:"Courier New"'><br><tt>To unsubscribe from this mailing list send a blank message to EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</tt><br><br></span><o:p></o:p></p></div></body></html>